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Finding the Third Proportional to 1,508 and 3,172

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Solution

The third proportional to 1,508 and 3,172 is: 6,672.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,508 : 3,172 = 3,172 : x
  2. Step 2: Convert to fraction form
    1,508/3,172 = 3,172/x
  3. Step 3: Cross multiply
    1,508x = 3,172 × 3,172
  4. Step 4: Simplify right side
    1,508x = 10,061,584
  5. Step 5: Solve for x
    x = 10,061,584/1,508
  6. Step 6: Final answer
    x = 6,672.14

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Why These Related Problems?

These problems maintain the same ratio (2.10) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.